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Production Process of Class 220℃ Insulation Dry-type Transformer

VPI Transformer
December 12, 2025
Category Connection: Three Phase Dry Type Transformer
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Tags:
#dry type transformer #medium voltage dry type transformers #VPI transformer
Brief: We tested it—see the highlights and what to expect in real operation. This video walks you through the production process of our Class 220℃ Insulation 2000kVA VPI Transformer, showcasing how we build these medium voltage dry-type transformers from 6.9kV to 480V. You'll see the advanced manufacturing techniques, including the Vacuum Pressure Impregnation (VPI) system, and learn how premium materials like NOMEX® paper insulation contribute to superior thermal resilience and safety.
Related Product Features:
  • Features a 220℃ Class R insulation system using premium NOMEX® paper for extended service life and high dielectric strength.
  • Vacuum Pressure Impregnated (VPI) technology seals insulation into a solid structure, enhancing mechanical stability and moisture resistance.
  • Delivers 99.40% high efficiency, exceeding DOE 2016, IEEE, and CSA standards to lower energy costs and reduce heat output.
  • UL/cUL certified and compliant with ANSI, IEEE, and DOE 2016 standards for regulatory acceptance in North America.
  • NEMA 3R weatherproof enclosure provides protection against rain, snow, and dust for flexible indoor and outdoor installation.
  • Designed for high-temperature settings with an ambient temperature rating of 40°C, suitable for data centers and manufacturing facilities.
  • Oil-free design eliminates fire and leak hazards, making it ideal for critical indoor applications.
  • Seismic-qualified construction ensures reliable performance in earthquake-prone regions.
FAQs:
  • What is the insulation class and material used in this transformer?
    This transformer features a Class R, 220℃ insulation system that utilizes premium NOMEX® paper. This material provides high dielectric strength, contamination resistance, and enables reliable operation in high-temperature environments, extending the transformer's service life.
  • Is this transformer suitable for outdoor installation?
    Yes, the transformer comes with a NEMA 3R weatherproof enclosure, which offers protection against rain, snow, and dust. This makes it suitable for both indoor and outdoor use, eliminating the need for additional shielding and reducing installation costs.
  • What certifications does this transformer hold for North American markets?
    The transformer is dual UL/cUL listed for the U.S. and Canada, and it complies with ANSI, IEEE, and DOE 2016 standards. It is also seismic-qualified, ensuring it meets strict regulatory requirements and performs reliably in various conditions, including earthquake-prone areas.
  • How does the Vacuum Pressure Impregnated (VPI) technology benefit the transformer?
    The VPI process seals the insulation into a solid, unified structure, which enhances mechanical and seismic stability. It improves resistance to moisture and corrosion, reduces partial discharge risks, and boosts overall safety and reliability, especially in harsh operating environments.
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